Building Mortars – MCQ || Building Materials

Building Mortars – MCQ

1. Building mortars are classified into ___ grades based on compressive strength

a) 4 grades
b) 6 grades
c) 7 grades
d) 9 grades

View Answer

d) 9 grades.

Building mortars are classified into 9 grades based on compressive strength

2. Lime mortars are the mixture of

a) Lime, cement, and water.
b) Cement, sand, and water.
c) Hydraulic lime, sand, water.
d) Air-hardening lime, sand, and tarpin.

View Answer

c) Hydraulic lime, sand, water.

3. Gauged mortar is the mixture of

a) stone dust, sand, and lime.
b) Lime, cement, sand.
c) Surkhi, lime, cement.
d) Sand, fly ash, cement.

View Answer

b) Lime, cement, sand.

4. After adding cement, the gauged mortar should be used within

a) 15 minutes.
b) 30 to 60 minutes.
c) 1 to 2 hours.
d) 3 to 6 hours.

View Answer

c) 1 to 2 hours.

5. Usually, lime mortar is made with

a) Pure lime.
b) Lean lime.
c) Hydraulic lime.
d) Air-hardening lime.
e) Both (c) or (d).

View Answer

e) Both (c) or (d).

6. The principal demerit in using lime mortar is that it

a) Sets slowly.
b) Swells.
c) is uneconomical.
d) is not sound.

View Answer

a) Sets slowly.

7. Lime is added to cement mortar because of

a) To increase the setting time.
b) To increase workability.
c) To make it economical.
d) All of these.

View Answer

b) To increase the workability.

8. In the case of making dam-proofing mortars, which of the following type of cement are used

a) Ordinary Portland cement.
b) Rapid hardening cement.
c) Sulphate resisting Portland cement.
d) Low-heat cement.

View Answer

c) Sulphate resisting portland cement.

9. Lime-cement mortar is also known as

a) Guarded mortar.
b) Gauged mortar.
c) Both (a) and (b).
d) Lime mortar.
e) None of these.

View Answer

c) Both (a) and (b).

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